What is the term for the political party with more members in both the House of Representatives and the Senate?

The term for the political party with more members in both the House of Representatives and the Senate is referred to as the Majority Party. This party holds a greater number of seats compared to any other party, which grants it significant influence over legislative decisions, including the ability to control the agenda, chair key committees, and facilitate the passage of legislation. The Majority Party's dominance in numbers is crucial for establishing leadership positions and directing the overall political strategy in Congress, making it a pivotal player in the legislative process. Understanding this concept is fundamental to grasping how power dynamics function within the U.S. legislative system.